President Barack Obama delivers a statement on Ukraine from the White House on Monday, March 17, 2014, in Washington. The president imposed sanctions against Russian officials, including advisers to President Vladimir Putin, for their support of Crimea's vote to secede from Ukraine.

WASHINGTON — President Barack Obama is imposing sanctions against Russian officials after Crimea's vote to secede from Ukraine.

Obama's executive order issued Monday names seven Russian government officials. The United States also says it identifies and targets the assets of other individuals who aren't government officials but are supporting them.

The Treasury Department also is imposing sanctions on four Ukrainians, including former President Viktor Yanukovych and two Crimea-based separatist leaders.

The U.S. announcement came shortly after the European Union announced travel bans and asset freezes on 21 people.